Hello, If your data.frame is named 'dat', try the following. cbind(year = rownames(dat), dat) Hope this helps, Rui Barradas Em 27-08-2013 20:34, catalin roibu escreveu: > hello all! > I have a problem! I don't know how to convert row names in first column > variables. > > Thank you very much for your help! > > CR >